spring session同域下单点登录实现解析
人气:0Session会话管理
在Web项目开发中,Session会话管理是一个很重要的部分,用于存储与记录用户的状态或相关的数据;通常情况下session交由容器(tomcat)来负责存储和管理,但是如果项目部署在多台tomcat中,则session管理存在很大的问题;
1、多台tomcat之间无法共享session,比如用户在tomcat A服务器上已经登录了,但当负载均衡跳转到tomcat B时,由于tomcat B服务器并没有用户的登录信息,session就失效了,用户就退出了登录;
2、一旦tomcat容器关闭或重启也会导致session会话失效;因此如果项目部署在多台tomcat中,就需要解决session共享的问题;
配置文件
pom.xml <dependency> <groupId>org.springframework.session</groupId> <artifactId>spring-session-data-redis</artifactId> <version>1.3.1.RELEASE</version> </dependency> web.xml <filter> <filter-name>springSessionRepositoryFilter</filter-name> <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class> </filter> <filter-mapping> <filter-name>springSessionRepositoryFilter</filter-name> <url-pattern>*.do</url-pattern> </filter-mapping> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value> classpath:applicationContext.xml </param-value> </context-param> applicationContext.xml <context:annotation-config/> <!-- 初始化一切spring-session准备,且把springSessionFilter放入IOC --> <bean id="redisHttpSessionConfiguration" class="org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration"> <property name="maxInactiveIntervalInSeconds" value="300"/> </bean> <!-- 配置cookie信息--> <bean class="org.springframework.session.web.http.DefaultCookieSerializer" id="defaultCookieSerializer"> <property name="cookieName" value="SESSION_NAME"/> <property name="domainName" value="wangjun.com"/> <property name="useHttpOnlyCookie" value="true"/> <property name="cookiePath" value="/"/> <property name="cookieMaxAge" value="31536000"/> </bean> <!-- 配置redis连接池信息--> <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig"> <property name="maxTotal" value="20"/> </bean> <!--配置redis连接信息--> <bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"> <property name="hostName" value="127.0.0.1"/> <property name="port" value="6379"/> <property name="poolConfig" ref="jedisPoolConfig"/> </bean>
代码测试
public class SessionServlet extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doGet(request,response); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String sesssionID = request.getSession().getId(); //部署两份,把这个地方8081改成8080就行了,只是为了区分 response.getWriter().write("8081 Server SessionID"+sesssionID); } }
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